Just noticed this today. I got 2 extremely similar private keys. Does anyone know if this could be a sign of a security issue with the PRNG?
Probably not Yes! This should not happen. Unless you altered the source to search from a specific starting point. I've never used VanitySearch (because I hardly trust any new software), and I don't know how it works internally, but I would expect it to generate a new random private key after finding a match. I think it's okay to add "+1" from a random number to search the next one (which I expect to be much faster than generating new private keys all the time), but two similar private keys shouldn't happen. I'm just using the official build, unaltered. (OS: Windows 10 with the latest security updates) Just found another 2 even more similar private keys: 0x90AD2D51198584C695F79D27512B147C865C7093E10065F4B4363881C882C87D 0x90AD2D51198584C695F79D27512B147C865C7093E10065F2B4363881C87CF970 PubAddress: bc1q22ace8n7qwe3xtazp05x6vl8fy7mkf5cwznnp5 Priv (WIF): p2wpkh:L24wedqSrZsKNmmF33fxZj75Xz4P4K562VzHKJCE4Q2p6TrBoJha Priv (HEX): 0x90AD2D51198584C695F79D27512B147C865C7093E10065F2B4363881C87CF970 PubAddress: bc1q22acevaq6x6r4867ay2n73qfgjlcj95pzrxx9x Priv (WIF): p2wpkh:L24wedqSrZsKNmmF33fxZj75Xz4P4K562WivkuVB3vnYXXDimUkL Priv (HEX): 0x90AD2D51198584C695F79D27512B147C865C7093E10065F4B4363881C882C87D At this point I'm guessing this is due to performance optimizations made by the developer? Can anyone try to reproduce this? I'm using the following search pattern: bc1q22ace |
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Just noticed this today. I got 2 extremely similar private keys. Does anyone know if this could be a sign of a security issue with the PRNG?
Probably not, but just asking to be sure.
C:\Users\demo\desktop>VanitySearch.exe bc1q22ace
VanitySearch v1.19
Difficulty: 33554432
Search: bc1q22ace [Compressed]
Start Sun Mar 10 10:21:35 2024
Base Key: CF08C5ECA140F4CF8A32B0673E3B88A2B5647661F4EFC0241E8F8E83709C04B5
Number of CPU thread: 4
[7.13 Mkey/s][GPU 0.00 Mkey/s][Total 2^27.02][Prob 98.3%][99% in 00:00:02][Found 0]
PubAddress: bc1q22acereqtjkhs0xx0a8u5gkdxn5xpvhltnwkcs
Priv (WIF): p2wpkh:L4AA9GpBX7GoRJy3wEgAhzg3zkL8diGmam8wcdCFjArkQKzBRgMu
Priv (HEX): 0xCF08C5ECA140F4CF8A32B0673E3B88A2B5647661F4EFC0251E8F8E8370FA8472
[7.13 Mkey/s][GPU 0.00 Mkey/s][Total 2^27.42][Prob 99.5%][99% in 00:00:00][Found 3]
PubAddress: bc1q22aceas0aw22n3rqnm8ws9gpynd8yzlx0alevd
Priv (WIF): p2wpkh:L4AA9GpBX7GoRJy3wEgAhzg3zkL8diGmamsb4EVCikuAiR3jqbG1
Priv (HEX): 0xCF08C5ECA140F4CF8A32B0673E3B88A2B5647661F4EFC0271E8F8E837113FB6D
[7.12 Mkey/s][GPU 0.00 Mkey/s][Total 2^27.64][Prob 99.8%][99% in 00:00:00][Found 4]
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i have 1524 of this dont get it out af the wallet LOL seed words dont work  Can you clarify, 1524 of what? According to xchain there is no address with 1524 XCP... |
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So I've lost my 12-word seed but I still know the first letter of each word.
Can I make a script trying all possible combinations and recover my seed in a reasonable amount of time?
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I'm pleased to accept 50/50% or offer even over 50%...
Would you like some Print Screen of them?
Yes please! |
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A general question, what is the best way to proceed without getting scammed, when person A has the password and person B has the wallet file ? Any suggestions?
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Whoever finds the password of this hash gets 10 Bitcoins.
$bitcoin$64$c9719d2471d5e444be11eb9602d8bda002e8608f1f69d62c2a5a7531c9714323$16$dd76df212917e53e$26768$2$00$2$00
Once password is found, pm me
Which wallet and addresses is it? |
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Hey @F4LC0N90
I cant get telegram working :-/
But in any case i have gotten the password for:
$bitcoin$64$a52322f90ea4a89c0158e302dad35833e67758090e94cd6c338c8af8103ac34d$16$a330d7d65767e173$200445$2$00$2$00
PM me pleeeease!
Dont want to miss out AGAIN!
Did you get in touch with someone who has the dat file? |
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Thanks everyone for the various approaches!
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Here is another fun way of doing it which is a lot faster and cheaper to do: If you run a SPV client like Electrum on your computer you already have all the block headers saved up in a ~60 MB file called "blockchain_headers" which is a stream of bytes. All you have to do is to programatically read this file to get the raw bytes which should be a multiple of 80. Each 80 byte is a block header of a block in chronological order (so you have the block height this way too). Then start from the beginning (byte 0) and extract the time from each 80 byte chunk (ie. one header) knowing that 4th item in it is the timestamp. version[4] + prev_hash[32] + merkle_root[32] + time[4] + target[4] + nonce[4]
Here is a pseudocode stream = File.Read("blockchain_headers")
while(stream.HasBytesLeft)
stream.Skip(68)
timestamp = stream.Read(4).ConvertToTime_LittleEndian()
resultList.Add(timestamp)
stream.Skip(8)
Now all you have to do is search in the list of timestamps to see when the day in the datetime you converted changes to get the last height of the day. The height is the index of the datetime inside the resultList/array. Keep in mind that timestamps are in UTC not your local time. Thanks, this does sound like a fun and effective way. I'll give it a shot! |
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I'm trying to programmatically get the block height at certain given dates - for instance, first day of each month.
I don't have access to a full node.
Is there a block explorer or other platform with an API endpoint (or just a small dump of such data somewhere) that could be helpful?
Thanks!
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Great informative responses, thanks everyone  |
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So 32 characters looks like the current limit to have been created from a private key.
Actually the current shortest known address that was created from a private key is 31 characters (discovered in 2014): 111111i4VTdHkzFqV2a4jntfZkdVk6B - See this thread: https://bitcointalk.org/index.php?topic=90982.0 |
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-snip-
I'm using Electrum on Windows.
I know I can view the fee for any transaction as you have mentioned, but I would like to view the fees for my entire transaction history at a glance, or be able to export this information to some type of text-based extract (csv or other).
You can only export the entire transaction history in " .json" format, that includes a " fee" and " fee_sat" names and values. Inbound transactions will show " null" values for the fee. Go to the menu " Wallet->History->Export" and select " json", or CSV if want it to be compact but it doesn't have " names", just values. Here's a 'Notepad++' trick to filter the export file: - Open 'electrum-history.json' file using Notepad++
- Use 'Find' (CTRL+F), go to 'Mark' tab and tick "bookmark line".
- Type "fee_sat" then click "Mark all", all lines with "fee_sat" will have blue-circle next to the line's number.
- Exit 'Find' dialogue box and click the menu "Search->Bookmark->Remove Unbookmarked Lines", and only "fee_sat" lines will be left.
If you want to remove the 'null' values, re-do all the steps but use " Clear all marks" in 'Find' first ( to remove the current bookmarks), bookmark lines with " null", then use " Search->Bookmark->Remove Bookmarked Lines" instead. Thanks a lot, that was very helpful.
I have never seen a proposal such as yours before. Can you tell me what you were planning to use the data for if it's not a secret?
If it has something to do with using the historical records to try and predict future fees, you are not going to find any correlation there because history doesn't repeat itself when it comes to fees.
I just wanted to get an idea of how much I paid in fees over the last few months. |
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Which wallet are you using? If it is Electrum, I do not think the fee can be added as an additional column. But on the transaction history, you can just select the transaction, right click on it and click on 'view transaction'. If the fee is not shown, you can click on 'view on block explorer' instead, but which will connect to blockstream, one of the blockchain explorers that details you the transaction in which the fee is included.
I'm using Electrum on Windows. I know I can view the fee for any transaction as you have mentioned, but I would like to view the fees for my entire transaction history at a glance, or be able to export this information to some type of text-based extract (csv or other). |
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Is there any way of adding a "fee paid" column to the history view?
Or alternatively, a console script to get fees paid for your past transactions?
Couldn't find anything in the forum.
Thanks!
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Does anyone know how of a mempool.space alternative, or a Python script, to calculate the fee ranges in the next few blocks (highlighted in red in this screenshot)?  |
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